[Tutor] Adding index numbers to tuple

[Christian Witts]

On 2011/08/16 03:10 PM, Timo wrote:
> Hello,
> Maybe a bit confusing topic title, probably the example will do.
>
> I have a tuple:
> t = ('a', 'b', 'c', 'd')
> And need the following output, list or tuple, doesn't matter:
> (0, 'a', 1, 'b', 2, 'c', 3, 'd')
>
> I tried with zip(), but get a list of tuples, which isn't the desired 
> output. Anyone with a solution or push in the right direction?
>
> Cheers,
> TImo
>
>
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor

 >>> t = ('a', 'b', 'c', 'd')
 >>> new_t = zip(xrange(len(t)), t)
 >>> new_t
[(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')]
 >>> from itertools import chain
 >>> list(chain.from_iterable(new_t))
[0, 'a', 1, 'b', 2, 'c', 3, 'd']

That would be for if you were using the zip way, but enumerate should be 
simpler as Martin pointed out.

-- 

Christian Witts
Python Developer

//
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/tutor/attachments/20110816/16f49096/attachment.html>